Adolf german btjlle



A. G. BULLE July 5 1927.

SPRAYER Filed Jan. 50. 1926 INVENTOR J6 6 .514110 WITNESSES M ATTORNEYSPatented July 5, 1927.

UNITED a STATES PATENT OFFICE.

SPRAYER.

Application filed January 30, 1926.. Serial No. 84,984.

This invention relates to sprayers and more particularly to an apparatusof this character which is in the nature of an atomizer, and which isdesigned to spray insecticides or other materials in powdered form, andit is to be distinctly understood that I use this term material toinclude any liquid or powder which might be employed for the purpose.

An object of the invention is to so arrange the fluid supply pipe as toform a trap in which a supply of fluid will be maintained in positionfor discharge when the air is forced over the outlet end of the tube andovercome the necessity of drawing the fluid from the tube at eachreciprocation of a piston or plunger.

Atomizers of this character heretofore in use employ a fluid supply tubewhich is vertically disposed or has a straight communication with theoutlet end of the air tube so that when the plunger is drawn backwardlythe fluid will fall from the tube back to its container and must bedrawn outwardly through the tube at each power stroke of the plunger. Inother words, a certain amount of suction or partial vacuum is utilized,first to lift the liquid to the point of discharge so that a largeportion of the power or air discharged is wasted before any sprayingactually takes place.

It is therefore the primary object of my invention to overcome this lossof power and ensure a more continuous spray than is possible withapparatus heretofore known.

With these and other objects in view, the invention consists in certainnovel features of construction and combinations and arrangements ofparts which will be more fully hereinafter described and pointed out inthe claim.

The accompanying drawing is a View in longitudinal section illustratingmy improved sprayer.

1 represents a pump cylinder having a cupped piston or plunger 2 thereinsecured to a rod 3 which projects through one end 4 of the cylinder 1and has a handle 5 thereon. An air discharge pipe 6 communicates withone end of the cylinder 1, and this tube has an appreciable length, or,in other words, it

is as long as may be desired to give the best results and to ensure asuflicient length of directed air so as to form a nozzle and allow thespray to be directed as may be desired,

which is secured to cylinder 1 in any approved manner, and has aremovable cap 8 normally closing the entrance to the tank or reservoir.9 represents an outlet tube or pipe which at one end is located withinthe reservoir 7 and terminates at a point slightly removed from thebottom of saidreservoir. This tube 9 extends through the wall of thereservoir and preferably through the top of said reservoir Where it isbent in a general compound curve, as indicated at 10, and extendsforwardly in an approximatel straight portion 11, then sharply upwar andhas a vertically positioned outlet end 12 over which the air from tube 6is dis-- charged.

With a construction such as above described, after the plunger has beenrecip rocated, the fluid will .be drawn up through the tube 9 andsprayed. On the rearward stroke of the piston or plunger 2 a certainamount of fluid will be entrapped and held in the tube 11 from itsoutlet end 12 to the highest point of the compound curve 10, so thatimmediately upon the forward stroke of the piston or plunger thedischarge or spray of fluid will begin and there will be no loss ofpower or time due to sucking the fluid from the tank, such as iscustomary with devices in general use.

\Vhile I hawe illustrated what I believe to be a preferred embodiment ofmy invention it is obvious that various slight changes and alterationsmight be made in the general form of the parts described withoutdeparting from the invention and hence I do not limit myself to theprecise details set forth but consider myself at liberty to make suchslight changes and alterations as fairly fall within the spirit andscope of the appended claim.

I claim:

A portable sprayer, including a c lindrical air pump, an air dischargetu e projecting longitudinally from the end of the pump, a reservoirsecured to the pump beneath the same, an outlet pipe communicating withthe interior of the reservoir, said pipe extending upwardly from thereservoir to a point adjacent the tube, then extending; downwardly andforwardly, and

then upwardly to a point adjacent the eX- treniity of the air tubewhereby a portion of the material is trapped between the firstlneutionedbend of the pipe and the outlet end thereof.

ADOLF GERMAN BULLE.

